Adjustable scaffold jack



Sept. 25, 1928. 1,685,445

L. BASH ADJUSTABLE SCAFFOLD JACK Filed Sept. 15,, 1927 In uemar Iinas 5 9.5

By Attorney Patented Sept. 25, 1928.

UNITED STATES LINUS BASH, OF TULSA, OKLAHOMA.

ADJUSTABLE SCAFFQLD JACK.

Application filed September 15, 1927. Serial No. 219,702.

This invention relates to new and useful improvements in scaffold jacks for use by paperhangers, plasterers, lathers and the like whereby they may be supported adjacent the ceiling of a building. The primary object of the invention resides in the provision of a. jack whereby the length of the same may be readily adjusted to meet various conditions existing in the papering, plastering or lathing of a ceiling.

In the drawing:

The figure is a perspective of my improved scaffold jack.

Now having particular reference to the drawing,the presentjackconsists of a relatively elongated narrow base board 5 preferably a section of a 2 x 4. Arranged upon this base intermediate the ends thereof a vertically extending hollow standard 6 provided at its lower end with oppositely extending ears 7, 7 that are boltedt-o the base as at 8.8. The standard is provided throughout its length with spaced openings .9 at opposed sides thereof while freely slidable within this standard is a solid bar 10 that is also formed with spaced transversely extending openings 11 adapted for registry with the openings in the hollow standard 6 whereby the'post may be rigidly secured at a predetermined position within the standard by a lock pin 12.

The upper end of the bar 10 is formed with a horizontal plate 13 upon which is disposed a cross bar 14 preferably a short section of a 2 x 4 this plate 13 being rigidly secured to the bar by wood screws 15. Arranged within registering sockets in the bottom of the bar It and the upper end of the bar 10 is a bracing dowel pin 16 which obviously assists the other connection between the bars 10 and 14 for preventing the bar 14 from becoming loose upon the bar 10.

At opposite ends of the bar 14 are pairs of vertically extending metallic cleats 1717 secured to opposite sides of the bar 14: by a bolt and nut connection as disclosed. The upper ends of these cleats extend above the upper edge of the bar 14 and are slightly flared outwardly and are adapted to support one end of a 2x4 or other wooden beam which is extended to another jack in spaced relation to the jack disclosed it being obvious that four of these jacks are necessary in the construction of the scaffolding, the sup porting boards being arranged horizontally between the bars that are supported at their ends by the adjustable jacks constructed in accordance with the present invention.

The hollow standard 6 is braced to the base board 5 by diagonally extending bars 1818, and are welded at their inner ends to the standard and that are secured at their outer ends adjacent the opposite ends of the baseboard by bolt connections 1919.

In view of the foregoing description when considered in conjunction with the accompanying drawing, it will be apparent that I have provided a highly novel, simple and extremely efficient scaffold jack that is well adapted for all of the purposes heretofore designated and even though I have herein shown and described the invention as consisting of certain detail structural elements it is nevertheless to be understood that some changes may be made therein Without affecting the spirit and scope of the appended claim.

Having thus described my invention, what I claim'as new is In a jack of the character described, a base, a hollow standard secured to the base intermediate its ends and extending vertically therefrom, a bar vertically slidable within the standard, means whereby the bar may be secured at predetermined points within the standard, a horizontal plate at the upper end of the bar, said bar being formed with a bore extending inwardly at its upper end, an elongated cross bar, a bore extending inwardly at the intermediate portion of the cross bar, a pin adapted to project from the bore of the bar for engagement within the bore of the cross bar, and means between the horizontal plate and the cross bar for securing the same together.

In testimony whereof I atfix my signature.

LINUS BASH. 

